open-reception appointment-booking-software up to 1.0.x GET {appointmentId} appointmentId improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, was found in open-reception appointment-booking-software up to 1.0.x. The impacted element is an unknown function of the file /api/tenants/{id}/appointments/{appointmentId} of the component GET Handler. Such manipulation of the argument appointmentId leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-48077. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in open-reception appointment-booking-software up to 1.0.x. Affected by this issue is some unknown functionality of the file /api/tenants/{id}/appointments/{appointmentId} of the component GET Handler. The manipulation of the argument appointmentId with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. CVE summarizes:

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.1.0, the GET handler at `/api/tenants/{id}/appointments/{appointmentId}` performs no authorization check before returning the appointment record. Any party who knows or obtains a valid appointment UUID receives the full row, including channel and agent IDs, time and timezone, status, and the AES-GCM ciphertext components (`encryptedPayload`, `iv`, `authTag`, `dataKey`). The same file's DELETE handler calls `checkPermission(locals, tenantId, true)` before allowing deletion. The intent is clear: appointment records are tenant-scoped and require authentication to access. The GET handler is missing the equivalent call. The middleware chain (`apiAuthHandle`, `authGuard`) does not compensate: API paths bypass `authGuard` entirely, and `apiAuthHandle` does not block requests to non-admin paths when no token is present. Version 1.1.0 patches the issue.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-48077 since 05/20/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Upgrading to version 1.1.0 eliminates this vulnerability.

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Productinfo

Type

• Appointment Software

Vendor

• open-reception

Name

• appointment-booking-software

Version

• 1.0

Website

• Product: https://github.com/open-reception/appointment-booking-software/

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